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/*
* $Id: PdfImage.java,v 1.58 2004/11/29 14:07:00 blowagie Exp $
* $Name: $
*
* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*
* REMARK:
* LZW/GIF is covered by a software patent which is owned by Unisys Corporation.
* Unisys refuses to license this patent for PDF-related use in software
* even when this software is released for free and may be freely distributed.
* HOWEVER:
* This library doesn't compress or decompress data using the LZW
* algorithm, nor does it create or visualize GIF-images in any way;
* it only copies parts of an existing GIF file into a PDF file.
*
* More information about the GIF format can be found in the following documents:
* * GRAPHICS INTERCHANGE FORMAT(sm) Version 89a
* (c)1987,1988,1989,1990 Copyright CompuServe Incorporated. Columbus, Ohio
* * LZW and GIF explained
* Steve Blackstock
* * http://mistress.informatik.unibw-muenchen.de/
* very special thanks to [email protected] for the algorithm
* to extract the LZW data from a GIF.
*/
package com.lowagie.text.pdf;
import com.lowagie.text.Image;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
/**
* PdfImage is a PdfStream containing an image-Dictionary and -stream.
*/
class PdfImage extends PdfStream {
static final int TRANSFERSIZE = 4096;
// membervariables
/** This is the PdfName of the image. */
protected PdfName name = null;
// constructor
/**
* Constructs a PdfImage-object.
*
* @param image the Image-object
* @param name the PdfName for this image
* @throws BadPdfFormatException on error
*/
public PdfImage(Image image, String name, PdfIndirectReference maskRef) throws BadPdfFormatException {
super();
this.name = new PdfName(name);
put(PdfName.TYPE, PdfName.XOBJECT);
put(PdfName.SUBTYPE, PdfName.IMAGE);
put(PdfName.WIDTH, new PdfNumber(image.width()));
put(PdfName.HEIGHT, new PdfNumber(image.height()));
if (image.isMask() && (image.bpc() == 1 || image.bpc() > 0xff))
put(PdfName.IMAGEMASK, PdfBoolean.PDFTRUE);
if (maskRef != null) {
if (image.isSmask())
put(PdfName.SMASK, maskRef);
else
put(PdfName.MASK, maskRef);
}
if (image.isMask() && image.isInvertMask())
put(PdfName.DECODE, new PdfLiteral("[1 0]"));
if (image.isInterpolation())
put(PdfName.INTERPOLATE, PdfBoolean.PDFTRUE);
InputStream is = null;
try {
// Raw Image data
if (image.isImgRaw()) {
// will also have the CCITT parameters
int colorspace = image.colorspace();
int transparency[] = image.getTransparency();
if (transparency != null && !image.isMask() && maskRef == null) {
String s = "[";
for (int k = 0; k < transparency.length; ++k)
s += transparency[k] + " ";
s += "]";
put(PdfName.MASK, new PdfLiteral(s));
}
bytes = image.rawData();
put(PdfName.LENGTH, new PdfNumber(bytes.length));
int bpc = image.bpc();
if (bpc > 0xff) {
if (!image.isMask())
put(PdfName.COLORSPACE, PdfName.DEVICEGRAY);
put(PdfName.BITSPERCOMPONENT, new PdfNumber(1));
put(PdfName.FILTER, PdfName.CCITTFAXDECODE);
int k = bpc - Image.CCITTG3_1D;
PdfDictionary decodeparms = new PdfDictionary();
if (k != 0)
decodeparms.put(PdfName.K, new PdfNumber(k));
if ((colorspace & Image.CCITT_BLACKIS1) != 0)
decodeparms.put(PdfName.BLACKIS1, PdfBoolean.PDFTRUE);
if ((colorspace & Image.CCITT_ENCODEDBYTEALIGN) != 0)
decodeparms.put(PdfName.ENCODEDBYTEALIGN, PdfBoolean.PDFTRUE);
if ((colorspace & Image.CCITT_ENDOFLINE) != 0)
decodeparms.put(PdfName.ENDOFLINE, PdfBoolean.PDFTRUE);
if ((colorspace & Image.CCITT_ENDOFBLOCK) != 0)
decodeparms.put(PdfName.ENDOFBLOCK, PdfBoolean.PDFFALSE);
decodeparms.put(PdfName.COLUMNS, new PdfNumber(image.width()));
decodeparms.put(PdfName.ROWS, new PdfNumber(image.height()));
put(PdfName.DECODEPARMS, decodeparms);
}
else {
switch(colorspace) {
case 1:
put(PdfName.COLORSPACE, PdfName.DEVICEGRAY);
if (image.isInverted())
put(PdfName.DECODE, new PdfLiteral("[1 0]"));
break;
case 3:
put(PdfName.COLORSPACE, PdfName.DEVICERGB);
if (image.isInverted())
put(PdfName.DECODE, new PdfLiteral("[1 0 1 0 1 0]"));
break;
case 4:
default:
put(PdfName.COLORSPACE, PdfName.DEVICECMYK);
if (image.isInverted())
put(PdfName.DECODE, new PdfLiteral("[1 0 1 0 1 0 1 0]"));
}
PdfDictionary additional = image.getAdditional();
if (additional != null)
putAll(additional);
if (image.isMask() && (image.bpc() == 1 || image.bpc() > 8))
remove(PdfName.COLORSPACE);
put(PdfName.BITSPERCOMPONENT, new PdfNumber(image.bpc()));
if (image.isDeflated())
put(PdfName.FILTER, PdfName.FLATEDECODE);
else {
flateCompress();
}
}
return;
}
// GIF, JPEG or PNG
String errorID;
if (image.rawData() == null){
is = image.url().openStream();
errorID = image.url().toString();
}
else{
is = new java.io.ByteArrayInputStream(image.rawData());
errorID = "Byte array";
}
int i = 0;
switch(image.type()) {
case Image.JPEG:
put(PdfName.FILTER, PdfName.DCTDECODE);
switch(image.colorspace()) {
case 1:
put(PdfName.COLORSPACE, PdfName.DEVICEGRAY);
break;
case 3:
put(PdfName.COLORSPACE, PdfName.DEVICERGB);
break;
default:
put(PdfName.COLORSPACE, PdfName.DEVICECMYK);
if (image.isInverted()) {
put(PdfName.DECODE, new PdfLiteral("[1 0 1 0 1 0 1 0]"));
}
}
put(PdfName.BITSPERCOMPONENT, new PdfNumber(8));
if (image.rawData() != null){
bytes = image.rawData();
put(PdfName.LENGTH, new PdfNumber(bytes.length));
return;
}
streamBytes = new ByteArrayOutputStream();
transferBytes(is, streamBytes, -1);
break;
default:
throw new BadPdfFormatException(errorID + " is an unknown Image format.");
}
put(PdfName.LENGTH, new PdfNumber(streamBytes.size()));
}
catch(IOException ioe) {
throw new BadPdfFormatException(ioe.getMessage());
}
finally {
if (is != null) {
try{
is.close();
}
catch (Exception ee) {
// empty on purpose
}
}
}
}
/**
* Returns the PdfName of the image.
*
* @return the name
*/
public PdfName name() {
return name;
}
static void transferBytes(InputStream in, OutputStream out, int len) throws IOException {
byte buffer[] = new byte[TRANSFERSIZE];
if (len < 0)
len = 0x7ffffff;
int size;
while (len != 0) {
size = in.read(buffer, 0, Math.min(len, TRANSFERSIZE));
if (size < 0)
return;
out.write(buffer, 0, size);
len -= size;
}
}
protected void importAll(PdfImage dup) {
name = dup.name;
compressed = dup.compressed;
streamBytes = dup.streamBytes;
bytes = dup.bytes;
hashMap = dup.hashMap;
}
}
